From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: arch/x86/kernel/traps.c:533:24: warning: Value stored to 't' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
Date: Fri, 03 Jun 2022 10:19:20 +0800 [thread overview]
Message-ID: <202206031015.fkhwSlYC-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 29860 bytes --]
::::::
:::::: Manual check reason: "low confidence static check warning: arch/x86/kernel/traps.c:533:24: warning: Value stored to 't' during its initialization is never read [clang-analyzer-deadcode.DeadStores]"
::::::
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
BCC: lkp(a)intel.com
CC: linux-kernel(a)vger.kernel.org
TO: Peter Zijlstra <peterz@infradead.org>
CC: Thomas Gleixner <tglx@linutronix.de>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 58f9d52ff689a262bec7f5713c07f5a79e115168
commit: b968e84b509da593c50dc3db679e1d33de701f78 x86/iopl: Fake iopl(3) CLI/STI usage
date: 9 months ago
:::::: branch date: 6 hours ago
:::::: commit date: 9 months ago
config: x86_64-randconfig-c007-20220530 (https://download.01.org/0day-ci/archive/20220603/202206031015.fkhwSlYC-lkp(a)intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0776c48f9b7e69fa447bee57c7c0985caa856be9)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b968e84b509da593c50dc3db679e1d33de701f78
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b968e84b509da593c50dc3db679e1d33de701f78
# save the config file
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 clang-analyzer
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
include/asm-generic/bug.h:100:3: note: expanded from macro '__WARN_printf'
__WARN_FLAGS(BUGFLAG_NO_CUT_HERE | BUGFLAG_TAINT(taint));\
^
arch/x86/include/asm/bug.h:76:33: note: expanded from macro '__WARN_FLAGS'
#define __WARN_FLAGS(flags) \
^
lib/math/reciprocal_div.c:47:2: note: Loop condition is false. Exiting loop
WARN(l == 32,
^
include/asm-generic/bug.h:132:3: note: expanded from macro 'WARN'
__WARN_printf(TAINT_WARN, format); \
^
include/asm-generic/bug.h:101:3: note: expanded from macro '__WARN_printf'
instrumentation_end(); \
^
include/linux/instrumentation.h:58:33: note: expanded from macro 'instrumentation_end'
# define instrumentation_end() do { } while(0)
^
lib/math/reciprocal_div.c:47:2: note: Loop condition is false. Exiting loop
WARN(l == 32,
^
include/asm-generic/bug.h:132:3: note: expanded from macro 'WARN'
__WARN_printf(TAINT_WARN, format); \
^
include/asm-generic/bug.h:97:38: note: expanded from macro '__WARN_printf'
#define __WARN_printf(taint, arg...) do { \
^
lib/math/reciprocal_div.c:51:14: note: The result of the left shift is undefined due to shifting by '64', which is greater or equal to the width of type 'unsigned long long'
mlow = 1ULL << (32 + l);
^ ~~~~~~~~
7 warnings generated.
arch/x86/crypto/blowfish_glue.c:159:10: warning: Although the value stored to 'nbytes' is used in the enclosing expression, the value is never actually read from 'nbytes' [clang-analyzer-deadcode.DeadStores]
while ((nbytes = walk.nbytes)) {
^ ~~~~~~~~~~~
arch/x86/crypto/blowfish_glue.c:159:10: note: Although the value stored to 'nbytes' is used in the enclosing expression, the value is never actually read from 'nbytes'
while ((nbytes = walk.nbytes)) {
^ ~~~~~~~~~~~
arch/x86/crypto/blowfish_glue.c:240:10: warning: Although the value stored to 'nbytes' is used in the enclosing expression, the value is never actually read from 'nbytes' [clang-analyzer-deadcode.DeadStores]
while ((nbytes = walk.nbytes)) {
^ ~~~~~~~~~~~
arch/x86/crypto/blowfish_glue.c:240:10: note: Although the value stored to 'nbytes' is used in the enclosing expression, the value is never actually read from 'nbytes'
while ((nbytes = walk.nbytes)) {
^ ~~~~~~~~~~~
Suppressed 5 warnings (3 in non-user code, 2 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (9 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (9 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
>> arch/x86/kernel/traps.c:533:24: warning: Value stored to 't' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct thread_struct *t = ¤t->thread;
^ ~~~~~~~~~~~~~~~~
arch/x86/kernel/traps.c:533:24: note: Value stored to 't' during its initialization is never read
struct thread_struct *t = ¤t->thread;
^ ~~~~~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (9 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
fs/jffs2/nodemgmt.c:516:47: warning: Access to field 'offset' results in a dereference of a null pointer (loaded from variable 'jeb') [clang-analyzer-core.NullDereference]
&& (jeb != c->nextblock || (ofs & ~3) != jeb->offset + (c->sector_size - jeb->free_size))) {
^~~
fs/jffs2/nodemgmt.c:507:2: note: Value assigned to 'jeb'
jeb = &c->blocks[ofs / c->sector_size];
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/jffs2/nodemgmt.c:509:2: note: 0 is < 1
jffs2_dbg(1, "%s(): Node@0x%x(%d), size 0x%x\n",
^
fs/jffs2/debug.h:69:6: note: expanded from macro 'jffs2_dbg'
if (CONFIG_JFFS2_FS_DEBUG >= level) \
^~~~~~~~~~~~~~~~~~~~~
./include/generated/autoconf.h:748:31: note: expanded from macro 'CONFIG_JFFS2_FS_DEBUG'
#define CONFIG_JFFS2_FS_DEBUG 0
^
fs/jffs2/nodemgmt.c:509:2: note: Taking false branch
jffs2_dbg(1, "%s(): Node at 0x%x(%d), size 0x%x\n",
^
fs/jffs2/debug.h:69:2: note: expanded from macro 'jffs2_dbg'
if (CONFIG_JFFS2_FS_DEBUG >= level) \
^
fs/jffs2/nodemgmt.c:509:2: note: Loop condition is false. Exiting loop
jffs2_dbg(1, "%s(): Node at 0x%x(%d), size 0x%x\n",
^
fs/jffs2/debug.h:67:37: note: expanded from macro 'jffs2_dbg'
#define jffs2_dbg(level, fmt, ...) \
^
fs/jffs2/nodemgmt.c:515:7: note: Assuming field 'nextblock' is null
if ((c->nextblock || ((ofs & 3) != REF_OBSOLETE))
^~~~~~~~~~~~
fs/jffs2/nodemgmt.c:515:7: note: Left side of '||' is false
fs/jffs2/nodemgmt.c:515:24: note: Assuming the condition is true
if ((c->nextblock || ((ofs & 3) != REF_OBSOLETE))
^~~~~~~~~~~~~~~~~~~~~~~~~
fs/jffs2/nodemgmt.c:515:6: note: Left side of '&&' is true
if ((c->nextblock || ((ofs & 3) != REF_OBSOLETE))
^
fs/jffs2/nodemgmt.c:516:10: note: Assuming 'jeb' is equal to field 'nextblock'
&& (jeb != c->nextblock || (ofs & ~3) != jeb->offset + (c->sector_size - jeb->free_size))) {
^~~~~~~~~~~~~~~~~~~
fs/jffs2/nodemgmt.c:516:10: note: Left side of '||' is false
fs/jffs2/nodemgmt.c:516:47: note: Access to field 'offset' results in a dereference of a null pointer (loaded from variable 'jeb')
&& (jeb != c->nextblock || (ofs & ~3) != jeb->offset + (c->sector_size - jeb->free_size))) {
^~~
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
kernel/time/clocksource.c:684:2: warning: Dereference of null pointer [clang-analyzer-core.NullDereference]
list_for_each_entry(cs, &clocksource_list, list) {
^
include/linux/list.h:630:13: note: expanded from macro 'list_for_each_entry'
pos = list_next_entry(pos, member))
^
include/linux/list.h:555:2: note: expanded from macro 'list_next_entry'
list_entry((pos)->member.next, typeof(*(pos)), member)
^
--
^~~~~~~~~~~~~~~~~~
fs/ntfs3/attrib.c:1570:3: note: Taking false branch
if (next_svcn == evcn1) {
^
fs/ntfs3/attrib.c:1575:7: note: Assuming field 'size' is 0
if (!ni->attr_list.size) {
^~~~~~~~~~~~~~~~~~~
fs/ntfs3/attrib.c:1575:3: note: Taking true branch
if (!ni->attr_list.size) {
^
fs/ntfs3/attrib.c:1577:8: note: Assuming 'err' is 0
if (err)
^~~
fs/ntfs3/attrib.c:1577:4: note: Taking false branch
if (err)
^
fs/ntfs3/attrib.c:1581:4: note: Value assigned to 'attr_b'
attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/ntfs3/attrib.c:1583:8: note: Assuming 'attr_b' is null
if (!attr_b) {
^~~~~~~
fs/ntfs3/attrib.c:1583:4: note: Taking true branch
if (!attr_b) {
^
fs/ntfs3/attrib.c:1585:5: note: Control jumps to line 1667
goto out;
^
fs/ntfs3/attrib.c:1667:6: note: Assuming 'new_valid' is <= 'data_size'
if (new_valid > data_size)
^~~~~~~~~~~~~~~~~~~~~
fs/ntfs3/attrib.c:1667:2: note: Taking false branch
if (new_valid > data_size)
^
fs/ntfs3/attrib.c:1670:15: note: Dereference of null pointer
valid_size = le64_to_cpu(attr_b->nres.valid_size);
^
include/linux/byteorder/generic.h:87:21: note: expanded from macro 'le64_to_cpu'
#define le64_to_cpu __le64_to_cpu
^
include/uapi/linux/byteorder/little_endian.h:32:50: note: expanded from macro '__le64_to_cpu'
#define __le64_to_cpu(x) ((__force __u64)(__le64)(x))
^~~
fs/ntfs3/attrib.c:1962:19: warning: Dereference of null pointer [clang-analyzer-core.NullDereference]
u32 data_size = le32_to_cpu(attr->res.data_size);
^
include/linux/byteorder/generic.h:89:21: note: expanded from macro 'le32_to_cpu'
#define le32_to_cpu __le32_to_cpu
^
include/uapi/linux/byteorder/little_endian.h:34:50: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^~~
fs/ntfs3/attrib.c:1946:17: note: 'attr' initialized to a null pointer value
struct ATTRIB *attr = NULL, *attr_b;
^~~~
fs/ntfs3/attrib.c:1953:6: note: Assuming 'bytes' is not equal to 0
if (!bytes)
^~~~~~
fs/ntfs3/attrib.c:1953:2: note: Taking false branch
if (!bytes)
^
fs/ntfs3/attrib.c:1958:6: note: Assuming 'attr_b' is non-null
if (!attr_b)
^~~~~~~
fs/ntfs3/attrib.c:1958:2: note: Taking false branch
if (!attr_b)
^
fs/ntfs3/attrib.c:1961:6: note: Assuming field 'non_res' is 0
if (!attr_b->non_res) {
^~~~~~~~~~~~~~~~
fs/ntfs3/attrib.c:1961:2: note: Taking true branch
if (!attr_b->non_res) {
^
fs/ntfs3/attrib.c:1962:19: note: Dereference of null pointer
u32 data_size = le32_to_cpu(attr->res.data_size);
^
include/linux/byteorder/generic.h:89:21: note: expanded from macro 'le32_to_cpu'
#define le32_to_cpu __le32_to_cpu
^
include/uapi/linux/byteorder/little_endian.h:34:50: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^~~
Suppressed 5 warnings (4 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
>> arch/x86/kernel/traps.c:533:24: warning: Value stored to 't' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct thread_struct *t = ¤t->thread;
^ ~~~~~~~~~~~~~~~~
arch/x86/kernel/traps.c:533:24: note: Value stored to 't' during its initialization is never read
struct thread_struct *t = ¤t->thread;
^ ~~~~~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
include/linux/list.h:70:13: warning: Access to field 'prev' results in a dereference of a null pointer (loaded from variable 'next') [clang-analyzer-core.NullDereference]
next->prev = new;
^
mm/zsmalloc.c:2293:25: note: Left side of '&&' is false
struct zs_pool *pool = container_of(shrinker, struct zs_pool,
^
include/linux/kernel.h:495:61: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
mm/zsmalloc.c:2293:25: note: Taking false branch
struct zs_pool *pool = container_of(shrinker, struct zs_pool,
^
include/linux/kernel.h:495:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:322:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:310:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:302:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
mm/zsmalloc.c:2293:25: note: Loop condition is false. Exiting loop
struct zs_pool *pool = container_of(shrinker, struct zs_pool,
^
include/linux/kernel.h:495:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:322:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:310:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:300:2: note: expanded from macro '__compiletime_assert'
do { \
^
mm/zsmalloc.c:2301:16: note: Calling 'zs_compact'
pages_freed = zs_compact(pool);
^~~~~~~~~~~~~~~~
mm/zsmalloc.c:2269:11: note: '?' condition is true
for (i = ZS_SIZE_CLASSES - 1; i >= 0; i--) {
vim +/t +533 arch/x86/kernel/traps.c
59c1dcbed5b51c Jann Horn 2019-12-19 530
b968e84b509da5 Peter Zijlstra 2021-09-17 531 static bool fixup_iopl_exception(struct pt_regs *regs)
b968e84b509da5 Peter Zijlstra 2021-09-17 532 {
b968e84b509da5 Peter Zijlstra 2021-09-17 @533 struct thread_struct *t = ¤t->thread;
b968e84b509da5 Peter Zijlstra 2021-09-17 534 unsigned char byte;
b968e84b509da5 Peter Zijlstra 2021-09-17 535 unsigned long ip;
b968e84b509da5 Peter Zijlstra 2021-09-17 536
b968e84b509da5 Peter Zijlstra 2021-09-17 537 if (!IS_ENABLED(CONFIG_X86_IOPL_IOPERM) || t->iopl_emul != 3)
b968e84b509da5 Peter Zijlstra 2021-09-17 538 return false;
b968e84b509da5 Peter Zijlstra 2021-09-17 539
b968e84b509da5 Peter Zijlstra 2021-09-17 540 if (insn_get_effective_ip(regs, &ip))
b968e84b509da5 Peter Zijlstra 2021-09-17 541 return false;
b968e84b509da5 Peter Zijlstra 2021-09-17 542
b968e84b509da5 Peter Zijlstra 2021-09-17 543 if (get_user(byte, (const char __user *)ip))
b968e84b509da5 Peter Zijlstra 2021-09-17 544 return false;
b968e84b509da5 Peter Zijlstra 2021-09-17 545
b968e84b509da5 Peter Zijlstra 2021-09-17 546 if (byte != 0xfa && byte != 0xfb)
b968e84b509da5 Peter Zijlstra 2021-09-17 547 return false;
b968e84b509da5 Peter Zijlstra 2021-09-17 548
b968e84b509da5 Peter Zijlstra 2021-09-17 549 if (!t->iopl_warn && printk_ratelimit()) {
b968e84b509da5 Peter Zijlstra 2021-09-17 550 pr_err("%s[%d] attempts to use CLI/STI, pretending it's a NOP, ip:%lx",
b968e84b509da5 Peter Zijlstra 2021-09-17 551 current->comm, task_pid_nr(current), ip);
b968e84b509da5 Peter Zijlstra 2021-09-17 552 print_vma_addr(KERN_CONT " in ", ip);
b968e84b509da5 Peter Zijlstra 2021-09-17 553 pr_cont("\n");
b968e84b509da5 Peter Zijlstra 2021-09-17 554 t->iopl_warn = 1;
b968e84b509da5 Peter Zijlstra 2021-09-17 555 }
b968e84b509da5 Peter Zijlstra 2021-09-17 556
b968e84b509da5 Peter Zijlstra 2021-09-17 557 regs->ip += 1;
b968e84b509da5 Peter Zijlstra 2021-09-17 558 return true;
b968e84b509da5 Peter Zijlstra 2021-09-17 559 }
b968e84b509da5 Peter Zijlstra 2021-09-17 560
--
0-DAY CI Kernel Test Service
https://01.org/lkp
next reply other threads:[~2022-06-03 2:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-03 2:19 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-01-26 3:44 arch/x86/kernel/traps.c:533:24: warning: Value stored to 't' during its initialization is never read [clang-analyzer-deadcode.DeadStores] kernel test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202206031015.fkhwSlYC-lkp@intel.com \
--to=lkp@intel.com \
--cc=kbuild@lists.01.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.